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15 Cards in this Set
- Front
- Back
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What is the kinetic-molecular theory assumptions?
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1. the KE of a gas is directly proportional to its absolute temperature. The greater the temperature, the greater the KE
2. the volume of gas particles is small compare to the volume of the space that the particles move in 3. No forces of attraction occur between the particles. When a collision takes place, ther is no loss of KE,. That is all collisions are perfectly elastic |
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What is standard temperature and pressure?
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0 C (273 K) and 1 atm
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One mole of gas will occupy ______ liters of volume
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22.4
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What is the ideal-gas equation?
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PV=nRT
P=the pressure of a gas in atm V=the volume occupied by the gas in liters n=the number of moles of the gas T=absolute temp of the gas R= the gas constant .0821L-atm/mol-K |
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Pressure, temperature, and volume, can all be varied for a gas...meaning...
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changes in any one of the three will affect the other two
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If the volume is constant...
P1/T1 =T1/P2 |
As pressure increases, temperature increases
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If the temperature is constant..
P1 x V1=P2 x V2 |
As pressure increases, volume decreases. (Boyle's Law)
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If the pressure is constant...
V1/T1 = V2/T2 |
As temp increaes, volume increases. (Charles's Law)
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What is the behavior of real gases?
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1. the net volume occupied by the molecules iis a significant fraction of the overall volume of the container
2. gas molecules do stick. They attract using van der waals forces |
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For volume the ideal gas equation tells us only how much empyty space surrounds the molecules, but under non-ideal conditions, the ideal volume that is calculated will be
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less than the real volume
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What is pressure?
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It is how many molecules are banging against the walls
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In non-ideal conditions which forces are causing the molecules to stick together
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van-der waals, london dispersion, and dipole, dipole forces
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The ideal gas equations gives us pressure based on the assumption that there will be a constatnt number of molecules banging against the wall, bu thwen some of the molecules stick together, there will be fewer collisions, meaning that...
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the "ideal" pressure that you calculate is greater than the real pressure
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What is the specific heat of liquid water?
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1 cal/g C
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What is specific heat
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The amount of heat added to the water and the change in temperature of the water
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